/* object based disk file system
*
- * This software is licensed under the GPL. See the file COPYING in the
- * top directory of this distribution for details.
+ * This code is issued under the GNU General Public License.
+ * See the file COPYING in this distribution
*
* Copyright (C), 1999, Stelias Computing Inc
*
#ifndef _OBDFS_H
-#define OBDFS_H
+#define _OBDFS_H
#include <linux/obd_class.h>
+#include <linux/obdo.h>
+#include <linux/list.h>
+
+/* super.c */
+struct obdfs_pgrq {
+ struct list_head rq_plist; /* linked list of req's */
+ unsigned long rq_jiffies;
+ struct page *rq_page; /* page to be written */
+};
-/* super.c */
-void obdfs_read_inode(struct inode *inode);
+extern struct list_head obdfs_super_list; /* list of all OBDFS superblocks */
-/* rw.c */
-int obdfs_readpage(struct dentry *dentry, struct page *page);
-int obdfs_writepage(struct dentry *dentry, struct page *page);
-struct page *obdfs_getpage(struct inode *inode, unsigned long offset, int create, int locked);
-int obdfs_write_one_page(struct file *file, struct page *page, unsigned long offset, unsigned long bytes, const char * buf);
-/* namei.c */
-struct dentry *obdfs_lookup(struct inode * dir, struct dentry *dentry);
-int obdfs_create (struct inode * dir, struct dentry * dentry, int mode);
-int obdfs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
-int obdfs_rmdir(struct inode *dir, struct dentry *dentry);
-int obdfs_unlink(struct inode *dir, struct dentry *dentry);
-int obdfs_mknod(struct inode *dir, struct dentry *dentry, int mode, int rdev);
-int obdfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname);
-int obdfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry);
-int obdfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry);
/* dir.c */
-int obdfs_check_dir_entry (const char * function, struct inode * dir,
- struct ext2_dir_entry_2 * de,
- struct page * page,
- unsigned long offset);
+extern struct file_operations obdfs_dir_operations;
+extern struct inode_operations obdfs_dir_inode_operations;
+
+/* file.c */
+extern struct file_operations obdfs_file_operations;
+extern struct inode_operations obdfs_file_inode_operations;
+
+/* flush.c */
+void obdfs_dequeue_pages(struct inode *inode);
+int obdfs_flushd_init(void);
+int obdfs_flushd_cleanup(void);
+int obdfs_flush_reqs(struct list_head *inode_list, unsigned long check_time);
+int obdfs_flush_dirty_pages(unsigned long check_time);
+
+/* namei.c */
+
+/* rw.c */
+int obdfs_do_writepage(struct page *, int sync);
+int obdfs_init_pgrqcache(void);
+void obdfs_cleanup_pgrqcache(void);
+inline void obdfs_pgrq_del(struct obdfs_pgrq *pgrq);
+int obdfs_readpage(struct file *file, struct page *page);
+int obdfs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to);
+int obdfs_commit_write(struct file *file, struct page *page, unsigned from, unsigned to);
+int obdfs_writepage(struct page *page);
+struct page *obdfs_getpage(struct inode *inode, unsigned long offset,
+ int create, int locked);
+int obdfs_write_one_page(struct file *file, struct page *page,
+ unsigned long offset, unsigned long bytes,
+ const char * buf);
+int obdfs_do_vec_wr(struct inode **inodes, obd_count num_io, obd_count num_oa,
+ struct obdo **obdos, obd_count *oa_bufs,
+ struct page **pages, char **bufs, obd_size *counts,
+ obd_off *offsets, obd_flag *flags);
+void obdfs_truncate(struct inode *inode);
+
+/* super.c */
+extern long obdfs_cache_count;
+extern long obdfs_mutex_start;
+
/* symlink.c */
-int obdfs_readlink (struct dentry *, char *, int);
-struct dentry *obdfs_follow_link(struct dentry *, struct dentry *, unsigned int);
-
-struct obdfs_sb_info {
- struct obd_conn osi_conn;
- struct super_block *osi_super;
- struct obd_device *osi_obd;
- struct obd_ops *osi_ops;
- ino_t osi_rootino; /* which root inode */
- int osi_minor; /* minor of /dev/obdX */
-};
+extern struct inode_operations obdfs_fast_symlink_inode_operations;
+extern struct inode_operations obdfs_symlink_inode_operations;
+/* sysctl.c */
void obdfs_sysctl_init(void);
void obdfs_sysctl_clean(void);
-struct obdfs_inode_info;
+static inline struct obdfs_sb_info *obdfs_i2sbi(struct inode *inode)
+{
+ return (struct obdfs_sb_info *) &(inode->i_sb->u.generic_sbp);
+}
-extern struct file_operations obdfs_file_operations;
-extern struct inode_operations obdfs_file_inode_operations;
-extern struct inode_operations obdfs_dir_inode_operations;
-extern struct inode_operations obdfs_symlink_inode_operations;
+static inline struct list_head *obdfs_iplist(struct inode *inode)
+{
+ struct obdfs_inode_info *info = obdfs_i2info(inode);
-static inline struct obd_ops *iops(struct inode *i)
+ return &info->oi_pages;
+}
+
+static inline struct list_head *obdfs_islist(struct inode *inode)
{
- struct obdfs_sb_info *sbi = (struct obdfs_sb_info *) &i->i_sb->u.generic_sbp;
- return sbi->osi_ops;
+ struct obdfs_inode_info *info = obdfs_i2info(inode);
+
+ return &info->oi_inodes;
}
-static inline struct obd_conn *iid(struct inode *i)
+static inline struct list_head *obdfs_slist(struct inode *inode)
{
- struct obdfs_sb_info *sbi = (struct obdfs_sb_info *) &i->i_sb->u.generic_sbp;
- return &sbi->osi_conn;
+ struct obdfs_sb_info *sbi = obdfs_i2sbi(inode);
+
+ return &sbi->osi_inodes;
}
-#define NOLOCK 0
-#define LOCKED 1
+static void inline obdfs_set_size (struct inode *inode, obd_size size)
+{
+ inode->i_size = size;
+ inode->i_blocks = (inode->i_size + inode->i_sb->s_blocksize - 1) >>
+ inode->i_sb->s_blocksize_bits;
+} /* obdfs_set_size */
-#ifdef OPS
-#warning "*** WARNING redefining OPS"
-#else
-#define OPS(sb,op) ((struct obdfs_sb_info *)(& ## sb ## ->u.generic_sbp))->osi_ops->o_ ## op
-#define IOPS(inode,op) ((struct obdfs_sb_info *)(& ## inode->i_sb ## ->u.generic_sbp))->osi_ops->o_ ## op
-#endif
-#ifdef ID
-#warning "*** WARNING redefining ID"
-#else
-#define ID(sb) (&((struct obdfs_sb_info *)( & ## sb ## ->u.generic_sbp))->osi_conn)
-#define IID(inode) (&((struct obdfs_sb_info *)( & ## inode->i_sb ## ->u.generic_sbp))->osi_conn)
+#if 0 /* PAGE CACHE DISABLED */
+
+#define obd_down(mutex) { \
+ /* CDEBUG(D_INFO, "get lock\n"); */ \
+ obdfs_mutex_start = jiffies; \
+ down(mutex); \
+ if (jiffies - obdfs_mutex_start) \
+ CDEBUG(D_CACHE, "waited on mutex %ld jiffies\n", \
+ jiffies - obdfs_mutex_start); \
+}
+
+#define obd_up(mutex) { \
+ up(mutex); \
+ if (jiffies - obdfs_mutex_start > 1) \
+ CDEBUG(D_CACHE, "held mutex for %ld jiffies\n", \
+ jiffies - obdfs_mutex_start); \
+ /* CDEBUG(D_INFO, "free lock\n"); */ \
+}
+
+/* We track if a page has been added to the OBD page cache by stting a
+ * flag on the page. We have chosen a bit that will hopefully not be
+ * used for a while.
+ */
+#define PG_obdcache 29
+#define OBDAddCachePage(page) test_and_set_bit(PG_obdcache, &(page)->flags)
+#define OBDClearCachePage(page) clear_bit(PG_obdcache, &(page)->flags)
+
+static inline void obdfs_print_plist(struct inode *inode)
+{
+ struct list_head *page_list = obdfs_iplist(inode);
+ struct list_head *tmp;
+
+ CDEBUG(D_INFO, "inode %ld: page", inode->i_ino);
+ /* obd_down(&obdfs_i2sbi(inode)->osi_list_mutex); */
+ if (list_empty(page_list)) {
+ CDEBUG(D_INFO, " list empty\n");
+ obd_up(&obdfs_i2sbi(inode)->osi_list_mutex);
+ return;
+ }
+
+ tmp = page_list;
+ while ( (tmp = tmp->next) != page_list) {
+ struct obdfs_pgrq *pgrq;
+ pgrq = list_entry(tmp, struct obdfs_pgrq, rq_plist);
+ CDEBUG(D_INFO, " %p", pgrq->rq_page);
+ }
+ CDEBUG(D_INFO, "\n");
+ /* obd_up(&obdfs_i2sbi(inode)->osi_list_mutex); */
+}
#endif
-#define OBDFS_SUPER_MAGIC 0x4711
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff